1,720,978 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Common carotid agenesis and internai carotid stenting.
No full textAgenesis of common carotid artery is rare and no report of stenting procedures (carotid artery stenting) for associated stenosis of the internal carotid have been published. We report a case of internal carotid stenosis associated with this anomaly. A 73-year-old male with left internal carotid artery originating from the arch, with significant stenosis, was referred to us. Wallstent was deployed with success. Carotid artery stenting should be reserved to uncomplicated arch anatomy and plaques with low fragmentation risk
Single device telemetric algorithm for absolute position measurement using a CCD camera.
No full textExtrapleural access with removal of the 11th rib in type IV thoracoabdominal aneurysms: Impact on postoperative management
No full textAim. Postoperative respiratory failure is one of the most frequent complications of thoracoabdominal aortic aneurysms (-TAAA): its occurrence is mainly linked to the extent of the surgical access (thoraco-phreno-laparotomy). The aim of this study was to evaluate the postoperative management of Type 4 TAAA, paying special attention to respiratory complications, with left extrapleural surgical access and removal of the 11th rib. Methods. Type IV TAAA treated using left extrapleural surgical access and removal of the 11th rib were examined in a retrospective study. The following parameters were analysed: preoperative respiratory (FEV1) and renal function, postoperative intubation time, length of intensive care unit stay, postoperative respiratory complications, postoperative renal insufficiency, perioperative morbidity and mortality (30 days). Results. The study was performed in 10 patients (9 males) with a mean age of 69 years (range 60-75), diagnosed with Type 4 TAAA whose upper proximal limit was the celiac tripod. None of the patients were obese; 90% of the patients were smokers. The preoperative chest X-ray showed a supraelevation of the left hemidiaphragm in 2 cases. In 10 cases, FEV1 ranged from 57% to 144%. Preoperative renal insufficiency was present in 2 cases (creatinine >2.0 mgdl). Surgery was performed electively in all cases. In total, there were 2 cases of postoperative respiratory failure (postoperative intubation time >12 hours). In the remaining cases mean postoperative intubation time was 5.3 hours (range: 4-8 hours). Both cases of respiratory failure were associated with transient renal insufficiency. The mean length of intensive care unit stay was 3.5 days (range: 0-15 days): a single day was sufficient in 50% of cases. Postoperative chest X-rays revealed only 1 new case of supraelevation of the left hemidiaphragm (2 were already present preoperatively), no case of pneumothorax and no case of infection. Two cases of transient postoperative renal insufficiency were observed: only 1 case required temporary hemodialysis. Redo surgery was necessary in 2 cases: in 1 case to empty the retroperitoneal hematoma and cross-over surgery in 1 case due to thrombosis of an iliac branch. There was no case of perioperative mortality. Conclusion. Based on these preliminary results, when practicable, this surgical access appears to promote a more rapid recovery of postoperative respiratory function
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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